Stream of consciousness rationale: The relevant information is: Castellanos is a Spanish habitational surname with the meaning "(from a place founded or inhabited by) Castilians".
The question and answer pair are described below.
Q: Castellanos is a Spanish habitational surname with the meaning "(from a place founded or inhabited by) Castilians". Notable people with the surname include:

Answer this question based on the passage: where does the last name castellanos originate from?
A: Spanish